JPS5920782B2 - Knitting method of bound spun yarn - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method for knitting bound spun yarn.

Conventionally, the temporary twist spinning method combines a draft device and a temporary twist device to produce a bundled spun yarn consisting of a core fiber bundle with virtually no twist, and wrapped fibers that are wound and bound around the core fiber bundle.
It is widely known from Japanese Patent Publication No. 52-43256.

The bundled spun yarn produced by such a temporary twist spinning method is versatile, and an alternative to the conventional ring spun yarn is being considered. When knitted in circular knitting or the like, there is a problem of deterioration of the surface quality of the knitted fabric due to generation of neps, which has been a problem in product development.

That is, as shown in FIG.
Basically, the core fiber bundle 1 is substantially twist-free, and the wrapped fibers 2 are wound around the core fiber bundle 1 in a spiral shape and tied together.

However, in reality, the core fiber bundle 1 often has a loose alternating twist, and the windings of the fibers 2 are not regular as shown in the figure, but may have irregularly wound parts or non-wound parts. There is also.

When such bundled yarn is subjected to conventional processes, that is, spinning and rewinding processes, waxing or oiling, and then knitting, more bends occur than in conventional ring yarns, and the quality of the knitted product deteriorates. There was a problem with the decline.

As a result of research and investigation into this problem, we discovered that tied spun yarn has a directionality with respect to the generation of neps, and that by defining the relationship between this directionality and the knitting process, the generation of neps can be suppressed, leading to the present invention. It is.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for knitting by knot spinning, which can improve the trouble caused by the generation of neps and produce knitted fabrics of good quality.

That is, in the method of knitting a bundled spun yarn of the present invention, when knitting a bundled spun yarn, the spun cheese is used as it is, or the bundled spun yarn that has been rewound an even number of times from the finished spun cheese is used, and waxing or oiling is applied. It is characterized by conducting and then compiling.

Hereinafter, the present invention will be described in detail according to embodiments shown in the drawings.

First, the direction of nep generation in bound spun yarn will be described.

This directionality means that the degree of nep generation differs depending on the number of windings, that is, the direction of squeezing.Experiments have shown that yarns that are wound back from spun cheese an odd number of times have fewer neps, while yarns that are wound back an even number of times have fewer neps. has a lot of NEP.

Specifically, the number of neps in spun finished yarn is almost the same as in once-wound yarn, and twice-wound yarn has more neps than once-wound yarn, but three-times-wound yarn has more neps than twice-wound yarn. The yarn has less neps.

This phenomenon can be considered as follows.

In other words, considering the manufacturing process of bound spun yarn, the first
The core fiber bundle 1 shown in the figure merely undergoes temporary twisting, and is basically a twisted-free fiber bundle that is parallel to each other, so there is little fuzz that is directly weighed from it.

On the other hand, it is considered that the wrapped fibers 2 are integrated in parallel with the rolled fiber bundle, or are wound with a different number of twists, and then wrapped around the core fiber bundle by the unrolling action.

This action is performed sequentially in the spinning direction of the yarn (in the direction of the arrow in Figure 1), so the wound fiber end in the spinning direction winds on the previously wound fiber, and the end of the wound fiber in the spinning direction winds on top of the previously wound fiber, Up to the part where the fibers are wrapped, the fibers are in a free state without being restrained, and the tip often appears as a long fluff 3 in FIG.

On the other hand, the wrapped fiber ends 4 on the opposite side to the spinning direction are held down by the fibers 2 that have been wound thereafter, or are restrained by being twisted into the core fiber bundle 1 when the core fiber bundle 1 is added. It is often in a taut state and rarely becomes fluffy.

Note that the spinning direction here refers to the direction from the temporary twisting device of the temporary twisting spinning machine to the wound cheese.

Therefore, with the tied spun yarn Y having such a directionality, there is no problem in the direction of fluffing in the first winding by squeezing with a yarn guide, etc., but in the second winding, the direction is reversed, as shown in Figure 2. As shown in A, the fluff mainly due to the wrapped fibers becomes small nep-like.

Rewind this again (3rd time) This small nep is the second
As shown in Figure B, it is stretched and disappears, resulting in a bound spun yarn Y with almost no nep.

Considering the above in relation to the knitting process, when waxing or oiling is performed using cheese that has been rewound once after spinning as in the past, the rubbing with thread guides, solid wax, etc. is difficult, and the neps are The most generated thread is wound into a cone.

When this is knitted, the yarn comes into contact with the knitting machine guides in the direction of fluffing, but the wax and oil reduce friction and the degree of straining is extremely light, so the nep of the cone yarn remains almost intact on the knitted fabric. Appears and degrades quality.

On the other hand, if waxing or oiling is performed using the spun cheese as it is or the cheese that has been rewound an even number of times as in the present invention, the neps that have occurred in the threads that have been rewound an even number of times will be removed. It is wrapped in a cone in a state where it is almost completely extinct.

When weaving using this cone, the yarn tends to generate some neps due to friction with the thread guide of the knitting machine that is pulled out from the cone and knitted, but due to the effects of wax etc., the neps are extremely small. It becomes knitting.

Note that the influence of the number of windings on the occurrence of neps becomes more noticeable as the yarn count becomes thinner.

Specifically, the effect becomes greater when the number is 308 or more, but the effect is remarkable when the number is 508 or more.

As explained above, in the present invention, when knitting the bound spun yarn, waxing or oiling is performed using the spun cheese as it is or the bound spun yarn which has been rewound an even number of times from the spun cheese, and then the spun cheese is waxed or oiled. By standing it upright, the fluff is laid down, so the generation of fluff and neps can be suppressed as much as possible.Especially, if you use freshly spun cheese as it is, you can fully utilize the characteristics of the binding spun yarn production process that winds it around cheese. Since the rewinding process can be omitted, it greatly contributes to the simplification of the process and improves the quality of the knitted fabric.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the bound spun yarn used in the present invention, and FIGS. 2A and 2B are diagrams of the nip invention of the bound spun yarn. 1... core fiber bundle, 2... winding fiber, 3
...Fuzz.

Claims (1)

[Claims] 1. When knitting the bound spun yarn, the spun cheese is used as it is, or the spun cheese is wound an even number of times.The bound spun yarn is waxed or oiled and then knitted. A method of knitting spun yarn.